EP3685033B1 - Motor vehicle with water injection device for an internal combustion engine - Google Patents

Motor vehicle with water injection device for an internal combustion engine Download PDF

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Publication number
EP3685033B1
EP3685033B1 EP18769609.1A EP18769609A EP3685033B1 EP 3685033 B1 EP3685033 B1 EP 3685033B1 EP 18769609 A EP18769609 A EP 18769609A EP 3685033 B1 EP3685033 B1 EP 3685033B1
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EP
European Patent Office
Prior art keywords
water
injection device
line
motor vehicle
water tank
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EP18769609.1A
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German (de)
French (fr)
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EP3685033A1 (en
Inventor
Stefan Woerz
Peter Schenk
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/025—Adding water
    • F02M25/028—Adding water into the charge intakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/0221—Details of the water supply system, e.g. pumps or arrangement of valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a motor vehicle comprising a water injection device for an internal combustion engine.
  • water can be obtained with the aid of a water extraction system, for example from the exhaust system of the internal combustion engine in the motor vehicle or from the surroundings of the motor vehicle and can also be fed to the water tank, for example.
  • a water extraction system for example from the exhaust system of the internal combustion engine in the motor vehicle or from the surroundings of the motor vehicle and can also be fed to the water tank, for example.
  • water can, for example, by means of a pump via a distributor device to injection valves, through which the water then, for example, into an intake manifold or a combustion chamber of the internal combustion engine is injected.
  • the distribution device for example in the form of a rail, can be provided to store water and to distribute it to a number of injection valves, through which the water can then be injected.
  • a special feature of injection devices for water compared to injection devices for fuel is that the water in the water injection device, in particular in the water tank, can freeze, for example after the internal combustion engine has been switched off. The frozen water must be thawed before the water injection device can be used again.
  • electric heaters for example, can be provided in the water injection device.
  • the documents WO 2016/177557 A1 , EP 2 918 813 A1 and DE 10 2014 222461 A1 show different water injection devices with electric heaters or hydraulic heat exchangers for thawing and heating the water.
  • a motor vehicle with a water injection device according to claim 1 is proposed.
  • the water injection device for an internal combustion engine has the advantage that the water injection device has powerful heating due to the heat exchanger and is ready for operation after a short time.
  • the heat exchanger is advantageously independent of the vehicle electrical system and the vehicle electrical system is not loaded by heating the water in the water injection device by a heat exchanger. Electric heaters via the on-board network must be operated can achieve a maximum of 500 watts of heating power at 12 volts and a maximum of 40 amperes, with special complex on-board networks up to 1000 to 1500W.
  • this maximum heat output which can be generated by an electric heater fed from the vehicle electrical system, is not sufficient to thaw the water in the water injection device in a short time, for example within 10 to 15 minutes, so that the water injection device is ready for use in a short time .
  • a comparatively high heat output can be generated by a heat exchanger in the water injection device. Due to the high heat input through a heat exchanger, heating outputs of over 1000 watts are possible without burdening the on-board network and without increased fuel consumption.
  • the frozen water in the water injection device for example in the water tank, can then advantageously be thawed quickly and the water injection can be ready for use in an advantageously short time in the range of 10 to 15 minutes.
  • the water can additionally be placed on such a high level that microorganisms in the water, in particular in the water tank, are killed and biocontamination of the water injection system is thereby advantageously prevented.
  • a heat exchanger in the water injection device represents an advantageously simple and efficient system for heating the water in the water injection device.
  • the water injection device further comprises a return line, through which the water injector is connected to the water tank, and which is set up to return water from the water injector to the water tank, the heat exchanger being located in the first line and/or in the second line and / or is arranged in the return line.
  • the water can thus be conveyed away from the water tank through the first line and/or through the second line and back into the water tank again through the return line.
  • the water can advantageously be pumped in a circle.
  • the water thus passes through the heat exchanger, which is arranged in the first line and/or in the second line and/or in the return line.
  • thawed water from the water tank via the first line and the second line and the return line to the heat exchanger are passed, are heated there by the heat exchanger, and are returned to the water tank via the return line, where the heated water can heat the water tank and thus further frozen water in the water tank can melt.
  • this small amount can be routed past the heat exchanger via the first line and the second line and the return line, where it is heated and returned to the water tank, where the water heated by the heat exchanger can thaw the remaining water.
  • the heat exchanger can advantageously be arranged in a different area of the motor vehicle than the water tank.
  • the heat exchanger can be arranged in a front area of the motor vehicle and the water tank can be arranged in a rear area of the vehicle.
  • the water injection device comprises at least one preheating device for preheating frozen water.
  • a small amount of frozen water can be pre-thawed by the preheating device, so that the water injection system has a small amount of thawed water available, which can be conveyed to the heat exchanger, where it can be heated and thus further frozen water in the water injection system can thaw.
  • the preheating device only has to deliver low heat outputs and can thus advantageously be designed, for example, as an electric heater that is fed by the vehicle electrical system.
  • the preheating device is arranged on the conveying element.
  • a preheating device arranged on the conveying element can advantageously remove frozen water from the conveying element. Due to the preheating device arranged according to the invention on the water tank, frozen water in the water tank can advantageously be thawed and the melted water can then be conveyed to the heat exchanger in order to be further heated there.
  • the heat exchanger is fed from the return of a passenger compartment heater.
  • the water injector is connected to a distributor, with the second line opening into the distributor, so that water can be supplied to the water injector via the second line and the distributor, with the return line opening into the distributor, so that water from the manifold can be returned to the water tank via the return line.
  • water from the water tank can be supplied to the distributor via the second line.
  • the water can be returned from the distributor to the water tank via the return line.
  • the water can thus advantageously flow through the distributor and thus, for example at high temperatures of the internal combustion engine, the distributor and the water injectors can advantageously be cooled by the water flowing through the distributor.
  • the water flowing through the distributor can advantageously be heated by the high temperatures of the internal combustion engine. In this way, the water can be heated not only in the heat exchanger but also in the distributor and thus advantageously higher temperatures can be achieved.
  • the return line can be used to flush out the air and for cooling at high engine compartment temperatures to avoid vapor.
  • a water injection device 1 of an internal combustion engine 2 is described in detail below according to various exemplary embodiments with reference to the figures.
  • the internal combustion engine 2 is operated according to the Otto principle and with direct fuel injection.
  • the internal combustion engine 2 has a plurality of cylinders.
  • the internal combustion engine 2 comprises a combustion chamber 20 per cylinder, in which a piston 21 can be moved back and forth. Furthermore, the internal combustion engine 2 has, for example, one intake port 22 per cylinder, via which air is supplied to the combustion chamber 20 . Exhaust gas is discharged via an exhaust gas duct 23 .
  • an inlet valve 25 is arranged on the inlet duct 22 and an outlet valve 26 is arranged on the exhaust gas duct 23 .
  • Reference numeral 24 also designates a fuel injection valve.
  • the water injection device 1 is an injection device through which water is injected into the internal combustion engine 2 .
  • other media can also be mixed with the water and stored, pumped and injected together with the water.
  • alcohols such as ethanol or methanol, or other additives that prevent the water from freezing, for example, can be added to the water.
  • the water injection device 1 comprises at least one water injector 6.
  • the water injector 6 is arranged on the inlet channel 22.
  • the water injector 6 injects water into the intake port 22 of the internal combustion engine 2 .
  • the water injector 6 is controlled by a control unit 13, for example.
  • one water injector 6 is provided per cylinder.
  • two water injectors can be arranged per cylinder for better treatment or to increase the maximum quantity of water that can be injected per combustion cycle.
  • a first exemplary embodiment of a water injection device 1 in a motor vehicle 100 is shown.
  • the water injection device 1 comprises a water tank 5 in which water is stored. Furthermore, the water injection device 1 comprises water injectors 6 which are arranged on a distributor 9 which distributes water to the water injectors 6 .
  • the water injectors 6 are provided for injecting water into the internal combustion engine 2 of the motor vehicle 100 .
  • the water injectors 6 are connected to the water tank 5 by a line 7,8.
  • a conveying element 3 embodied, for example, as a pump.
  • the conveying element 3 can convey water from the water tank 5 to the water injectors 6 .
  • the conveying element 3 is arranged in the line 7, 8, which connects the water tank 5 to the water injectors 6.
  • the conveying element 3 is designed, for example, as a pump.
  • the conveying element 3 divides the line 7 , 8 into a first line 7 and a second line 8 .
  • the water tank 5 is connected to the conveying element 3 through the first line 7 .
  • the conveying element is connected to the water injectors 6 by the second line 8 .
  • the second line 8 opens into the distributor 9 to which the water injectors 6 are connected. Water from the water tank 5 can thus be conveyed further via the first line 7 to the conveying element 3 through the second line 8 and the distributor 9 to the water injectors 6 .
  • the water injection device in this exemplary embodiment also includes a return line 10.
  • the return line 10 connects the water injectors 6 to the water tank 5.
  • the return line 10 is connected to the distributor 9 and to the water tank 5 in this exemplary embodiment.
  • water from the water injectors 6 can be conveyed back to the water tank 5 via the distributor 9 through the return line 10 .
  • the return line 10 is designed to return water from the water injector 6 to the water tank 5 .
  • the second line 8 is connected to a first end of the distributor 9 , which is tubular in this exemplary embodiment, and the return line 10 is connected to a second end of the distributor 9 . Water can thus flow through the distributor 9 from the first end of the distributor 9 to the second end of the distributor 9 .
  • the heat exchanger 50 is arranged in the second line 8.
  • the heat exchanger 50 can also be arranged, for example, in the return line 10 or the first line 7 .
  • a heat exchanger is understood to mean a device which is set up to transfer thermal energy from at least one first material flow to a second material flow. That's how the Water injection device 1 transfer thermal energy from a first material flow, for example a material flow of the passenger compartment heating, to a water flow of the water in the water injection device 1 .
  • a first material flow for example a material flow of the passenger compartment heating
  • a water flow is created.
  • This water flow is conducted through the heat exchanger 50 as a second flow, with heat being transferred in the heat exchanger 50 from a first flow, for example a flow of the passenger compartment heater, to the water flow and thus the water flow in the heat exchanger 50 being heated.
  • the water injection device 1 further comprises a pre-heating device 45 for pre-heating frozen water.
  • a preheating device 45 is arranged on the conveying element 3 and is set up to heat the conveying element 3 and to at least partially melt water that is frozen in the conveying element 3 .
  • a preheating device 45 is arranged on the water tank 5 and is set up to heat the water tank 5 and to at least partially melt water that has frozen in the water tank 5 .
  • the preheating device 45 can be an electric heater, for example, which is fed, for example, via the on-board network of the motor vehicle.
  • the water tank 5 is arranged in a rear area 102 of the motor vehicle 100 and the heat exchanger 50 is arranged in a front area 101 of the motor vehicle 100 .
  • the front area 101 of the motor vehicle 100 for example in the case of a two-axle motor vehicle 100, is understood to mean the area that is closer to the front axle of the motor vehicle 100 than to the rear axle of the motor vehicle 100.
  • Under the rear area 102 of the motor vehicle 100 is understood in the context of the present application, for example in a two-axle motor vehicle 100, as the area that is closer to the rear axle of motor vehicle 100 than to the front axle of motor vehicle 100.
  • a second exemplary embodiment of the water injection device 1 is shown.
  • the water is distributed to the water injectors 6 via a hose distributor.
  • the return line 10 does not open into the distributor 9 but into the second line 8 .
  • water can be conveyed back to the water tank 5 from the water injectors 6 via the second line 8 and the return line 10 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft ein Kraftfahrzeug umfassend eine Wassereinspritzvorrichtung für eine Brennkraftmaschine.The present invention relates to a motor vehicle comprising a water injection device for an internal combustion engine.

Aufgrund steigender Anforderungen an reduzierte Kohlenstoffdioxidemissionen werden Brennkraftmaschinen zunehmend hinsichtlich des Kraftstoffverbrauchs optimiert. Allerdings können bekannte Brennkraftmaschinen in Betriebspunkten mit hoher Last nicht optimal im Hinblick auf den Verbrauch betrieben werden, da der Betrieb durch Klopfneigung und hohe Abgastemperaturen begrenzt ist. Eine mögliche Maßnahme zur Reduzierung der Klopfneigung und zur Senkung der Abgastemperaturen ist die Einspritzung von Wasser. Hierbei sind üblicherweise separate Wassereinspritzsysteme vorhanden, um die Wassereinspritzung zu ermöglichen. So ist beispielsweise aus der DE 10 2015 208 476 A1 ein Wassereinspritzsystem für eine Brennkraftmaschine bekannt. Bei Wassereinspritzsystemen für Brennkraftmaschinen ist normalerweise ein Wassertank vorgesehen, so dass jederzeit Wasser zur Einspritzung in das Saugrohr oder die Brennkammer der Brennkraftmaschine verfügbar ist. Zusätzlich kann bei derartigen Wassereinspritzsystemen Wasser mit Hilfe einer Wassergewinnungsanlage beispielsweise aus dem Abgassystem der Brennkraftmaschine in dem Kraftfahrzeug oder aus der Umgebung des Kraftfahrzeugs gewonnen werden und beispielsweise auch dem Wassertank zugeführt werden. Von dem Wassertank kann Wasser beispielsweise mittels einer Pumpe über eine Verteilervorrichtung zu Einspritzventilen, durch die das Wasser dann beispielsweise in ein Saugrohr oder eine Brennkammer der Brennkraftmaschine eingespritzt wird, befördert werden. Dazu kann, wie bei Einspritzsystemen für Brennstoff, die Verteilervorrichtung, beispielsweise in Form eines Rails, dazu vorgesehen sein Wasser zu speichern und auf mehrere Einspritzventile, durch die das Wasser dann eingespritzt werden kann, zu verteilen.Due to increasing demands for reduced carbon dioxide emissions, internal combustion engines are increasingly being optimized in terms of fuel consumption. However, known internal combustion engines cannot be operated optimally in terms of consumption at operating points with high loads, since operation is limited by a tendency to knock and high exhaust gas temperatures. A possible measure to reduce the tendency to knock and to lower the exhaust gas temperatures is the injection of water. In this case, separate water injection systems are usually present in order to enable the water injection. For example, from the DE 10 2015 208 476 A1 a water injection system for an internal combustion engine is known. In water injection systems for internal combustion engines, a water tank is usually provided so that water is available at all times for injection into the intake manifold or combustion chamber of the internal combustion engine. In addition, with such water injection systems, water can be obtained with the aid of a water extraction system, for example from the exhaust system of the internal combustion engine in the motor vehicle or from the surroundings of the motor vehicle and can also be fed to the water tank, for example. From the water tank, water can, for example, by means of a pump via a distributor device to injection valves, through which the water then, for example, into an intake manifold or a combustion chamber of the internal combustion engine is injected. For this purpose, as in fuel injection systems, the distribution device, for example in the form of a rail, can be provided to store water and to distribute it to a number of injection valves, through which the water can then be injected.

Eine Besonderheit von Einspritzvorrichtungen für Wasser gegenüber Einspritzvorrichtungen für Brennstoffe ist, dass das Wasser in der Wassereinspritzvorrichtung, insbesondere in dem Wassertank, beispielsweise nach Abstellen der Brennkraftmaschine gefrieren kann. Um die Wassereinspritzvorrichtung dann wieder in Betrieb zu nehmen, muss das gefrorene Wasser aufgetaut werden. Dazu können in der Wassereinspritzvorrichtung beispielsweise elektrische Heizungen vorgesehen sein. Die Dokumente WO 2016/177557 A1 , EP 2 918 813 A1 und DE 10 2014 222461 A1 zeigen unterschiedliche Wassereinspritzvorrichtungen mit elektrischen Heizungen oder hydraulischen Wärmetauschern zum Auftauen und Heizen des Wassers.A special feature of injection devices for water compared to injection devices for fuel is that the water in the water injection device, in particular in the water tank, can freeze, for example after the internal combustion engine has been switched off. The frozen water must be thawed before the water injection device can be used again. For this purpose, electric heaters, for example, can be provided in the water injection device. The documents WO 2016/177557 A1 , EP 2 918 813 A1 and DE 10 2014 222461 A1 show different water injection devices with electric heaters or hydraulic heat exchangers for thawing and heating the water.

Offenbarung der ErfindungDisclosure of Invention

Erfindungsgemäß wird ein Kraftfahrzeug mit Wassereinspritzvorrichtung gemäß Anspruch 1 vorgeschlagen.According to the invention, a motor vehicle with a water injection device according to claim 1 is proposed.

Vorteile der ErfindungAdvantages of the Invention

Gegenüber dem Stand der Technik weist die Wassereinspritzvorrichtung für eine Brennkraftmaschine den Vorteil auf, dass die Wassereinspritzvorrichtung durch den Wärmetauscher über eine leistungsfähige Heizung verfügt und nach kurzer Zeit betriebsbereit ist. Der Wärmetauscher ist vorteilhaft unabhängig vom Bordnetz und das Bordnetz wird durch eine Aufheizung des Wassers in der Wassereinspritzvorrichtung durch einen Wärmetauscher nicht belastet. Elektrische Heizungen, die über das Bordnetz betrieben werden müssen, können bei 12 Volt und maximal 40 Ampere höchstens-500 Watt an Heizleistung erzielen, mit speziellen aufwändigen Bordnetzen bis zu 1000 bis 1500W. Diese maximale Heizleistung, die durch eine vom Bordnetz gespeiste elektrische Heizung erzeugt werden kann, reicht allerding nicht aus, um das Wasser in der Wassereinspritzvorrichtung in kurzer Zeit, beispielsweise innerhalb von 10 bis 15 Minuten, aufzutauen, so dass die Wassereinspritzvorrichtung in kurzer Zeit einsatzbereit ist. Durch einen Wärmetauscher in der Wassereinspritzvorrichtung kann eine vergleichsweise hohe Heizleistung erzeugt werden. Durch den hohen Wärmeeintrag durch einen Wärmetauscher sind Heizleistungen über 1000 Watt möglich ohne das Bordnetz zu belasten und ohne erhöhten Kraftstoffverbrauch. Das gefrorene Wasser in der Wassereinspritzvorrichtung, beispielsweise in dem Wassertank, kann dann vorteilhaft schnell aufgetaut werden und die Wassereinspritzung kann in vorteilhaft kurzer Zeit im Bereich von 10 bis 15 Minuten einsatzbereit sein. Durch die Heizleistung des Wärmetauschers kann das Wasser zusätzlich derart stark aufgesetzt werden, dass Mikroorganismen im Wasser, insbesondere im Wassertank, abgetötet werden und dadurch Biokontamination des Wassereinspritzsystems vorteilhaft verhindert wird. Insgesamt stellt ein Wärmetauscher in der Wassereinspritzvorrichtung ein vorteilhaft einfaches und leistungsfähiges System dar um das Wasser in der Wassereinspritzvorrichtung aufzuheizen.Compared to the prior art, the water injection device for an internal combustion engine has the advantage that the water injection device has powerful heating due to the heat exchanger and is ready for operation after a short time. The heat exchanger is advantageously independent of the vehicle electrical system and the vehicle electrical system is not loaded by heating the water in the water injection device by a heat exchanger. Electric heaters via the on-board network must be operated can achieve a maximum of 500 watts of heating power at 12 volts and a maximum of 40 amperes, with special complex on-board networks up to 1000 to 1500W. However, this maximum heat output, which can be generated by an electric heater fed from the vehicle electrical system, is not sufficient to thaw the water in the water injection device in a short time, for example within 10 to 15 minutes, so that the water injection device is ready for use in a short time . A comparatively high heat output can be generated by a heat exchanger in the water injection device. Due to the high heat input through a heat exchanger, heating outputs of over 1000 watts are possible without burdening the on-board network and without increased fuel consumption. The frozen water in the water injection device, for example in the water tank, can then advantageously be thawed quickly and the water injection can be ready for use in an advantageously short time in the range of 10 to 15 minutes. Due to the heat output of the heat exchanger, the water can additionally be placed on such a high level that microorganisms in the water, in particular in the water tank, are killed and biocontamination of the water injection system is thereby advantageously prevented. Overall, a heat exchanger in the water injection device represents an advantageously simple and efficient system for heating the water in the water injection device.

Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung werden durch die in den Unteransprüchen angegebenen Merkmale ermöglicht.Further advantageous refinements and developments of the invention are made possible by the features specified in the dependent claims.

Gemäß eines vorteilhaften Ausführungsbeispiels ist es vorgesehen, dass die Wassereinspritzvorrichtung weiterhin eine Rücklaufleitung umfasst, durch die der Wasserinjektor mit dem Wassertank verbunden ist, und die eingerichtet ist, Wasser vom Wasserinjektor zum Wassertank zurückzuführen, wobei der Wärmetauscher in der ersten Leitung und/oder in der zweiten Leitung und/oder in der Rücklaufleitung angeordnet ist. Somit kann das Wasser durch die erste Leitung und/oder durch die zweite Leitung von dem Wassertank weg gefördert werden und durch die Rücklaufleitung wieder in den Wassertank zurückgefördert werden. Somit kann das Wasser vorteilhaft im Kreis gepumpt werden. Das Wasser passiert somit in diesem Kreislauf den Wärmetauscher, der in der ersten Leitung und/oder in der zweiten Leitung und/oder in der Rücklaufleitung angeordnet ist. Somit kann aufgetautes Wasser aus dem Wassertank über die erste Leitung und die zweite Leitung und die Rücklaufleitung an dem Wärmetauscher vorbeigeführt werden, dort durch den Wärmetauscher erwärmt werden, und über die Rücklaufleitung wieder in den Wassertank zurückgeführt werden, wo das erwärmte Wasser den Wassertank erwärmen kann und somit weiteres gefrorenes Wasser in dem Wassertank schmelzen kann. Ist das Wasser im Wassertank beispielsweise zum Großteil gefroren und nur eine geringe Menge Wasser aufgetaut so kann diese geringe Menge über die erste Leitung und die zweite Leitung und die Rücklaufleitung an dem Wärmetauscher vorbeigeführt und dort erwärmt werden und wieder in den Wassertank zurückgefördert werden, wo das durch den Wärmetauscher erhitzte Wasser das restliche Wasser auftauen kann.According to an advantageous exemplary embodiment, it is provided that the water injection device further comprises a return line, through which the water injector is connected to the water tank, and which is set up to return water from the water injector to the water tank, the heat exchanger being located in the first line and/or in the second line and / or is arranged in the return line. The water can thus be conveyed away from the water tank through the first line and/or through the second line and back into the water tank again through the return line. In this way, the water can advantageously be pumped in a circle. In this circuit, the water thus passes through the heat exchanger, which is arranged in the first line and/or in the second line and/or in the return line. Thus, thawed water from the water tank via the first line and the second line and the return line to the heat exchanger are passed, are heated there by the heat exchanger, and are returned to the water tank via the return line, where the heated water can heat the water tank and thus further frozen water in the water tank can melt. For example, if the water in the water tank is mostly frozen and only a small amount of water has thawed, this small amount can be routed past the heat exchanger via the first line and the second line and the return line, where it is heated and returned to the water tank, where the water heated by the heat exchanger can thaw the remaining water.

Auf diese Weise kann der Wärmetauscher vorteilhaft in einem anderen Bereich des Kraftfahrzeugs angeordnet sein als der Wassertank. So kann der Wärmetauscher beispielsweise in einem Frontbereich des Kraftfahrzeugs angeordnet sein und der Wassertank kann in einem Heckbereich des Fahrzeugs angeordnet sein.In this way, the heat exchanger can advantageously be arranged in a different area of the motor vehicle than the water tank. For example, the heat exchanger can be arranged in a front area of the motor vehicle and the water tank can be arranged in a rear area of the vehicle.

Erfindungsgemäß ist es vorgesehen, dass die Wassereinspritzvorrichtung wenigstens eine Vorheizvorrichtung zum Vorheizen von gefrorenem Wasser umfasst. Durch die Vorheizvorrichtung kann eine geringe Menge von gefrorenem Wasser vorgetaut werden, so dass dem Wassereinspritzsystem eine geringe Menge von aufgetautem Wasser zur Verfügung steht, das zum Wärmetauscher gefördert werden kann, dort erwärmt werden kann und somit weiteres gefrorenes Wasser in dem Wassereinspritzsystem auftauen kann. Die Vorheizvorrichtung muss im Vergleich zum Wärmetauscher nur geringe Heizleistungen liefern und kann so vorteilhaft beispielsweise als elektrische Heizung, die vom Bordnetz gespeist wird, ausgebildet sein.According to the invention, it is provided that the water injection device comprises at least one preheating device for preheating frozen water. A small amount of frozen water can be pre-thawed by the preheating device, so that the water injection system has a small amount of thawed water available, which can be conveyed to the heat exchanger, where it can be heated and thus further frozen water in the water injection system can thaw. In comparison to the heat exchanger, the preheating device only has to deliver low heat outputs and can thus advantageously be designed, for example, as an electric heater that is fed by the vehicle electrical system.

Gemäß eines nicht beanspruchten Ausführungsbeispiels ist es vorgesehen, dass die Vorheizvorrichtung an dem Förderelement angeordnet ist. Eine an dem Förderelement angeordnete Vorheizvorrichtung kann das Förderelement vorteilhaft von gefrorenem Wasser befreien. Durch die erfindungsgemäß an dem Wassertank angeordnete Vorheizvorrichtung kann gefrorenes Wasser in dem Wassertank vorteilhaft aufgetaut werden und das geschmolzene Wasser dann zu dem Wärmetauscher gefördert werden um dort weiter erwärmt zu werden.According to an exemplary embodiment that is not claimed, it is provided that the preheating device is arranged on the conveying element. A preheating device arranged on the conveying element can advantageously remove frozen water from the conveying element. Due to the preheating device arranged according to the invention on the water tank, frozen water in the water tank can advantageously be thawed and the melted water can then be conveyed to the heat exchanger in order to be further heated there.

Gemäß eines vorteilhaften Ausführungsbeispiels ist es vorgesehen, dass der Wärmetauscher aus dem Rücklauf einer Fahrgastraumheizung gespeist wird.According to an advantageous exemplary embodiment, it is provided that the heat exchanger is fed from the return of a passenger compartment heater.

Gemäß eines vorteilhaften Ausführungsbeispiels ist es vorgesehen, dass der Wasserinjektor an einen Verteiler angeschlossen ist, wobei die zweite Leitung in den Verteiler mündet, so dass dem Wasserinjektor über die zweite Leitung und den Verteiler Wasser zugeführt werden kann, wobei die Rücklaufleitung in den Verteiler mündet, so dass Wasser aus dem Verteiler über die Rücklaufleitung zu dem Wassertank zurückgeführt werden kann. So kann dem Verteiler über die zweite Leitung Wasser aus dem Wassertank zugeführt werden. Über die Rückleitung kann das Wasser wieder aus dem Verteiler in den Wassertank zurückgeführt werden. Der Verteiler kann somit vorteilhaft von dem Wasser durchflossen werden und somit können beispielsweise bei hohen Temperaturen der Brennkraftmaschine der Verteiler und die Wasserinjektoren durch das den Verteiler durchfließende Wasser vorteilhaft gekühlt werden. Gleichzeitig kann das den Verteiler durchfließende Wasser durch die hohen Temperaturen der Brennkraftmaschine vorteilhaft erwärmt werden. So kann das Wasser nicht nur in den Wärmetauscher sondern auch in dem Verteiler erwärmt werden und somit vorteilhaft höhere Temperaturen erreicht werden. Zusätzlich kann die Rücklaufleitung zum Ausspülen der Luft und zum Kühlen bei hohen Motorraumtemperaturen zur Vermeidung von Dampf genutzt werden.According to an advantageous exemplary embodiment, it is provided that the water injector is connected to a distributor, with the second line opening into the distributor, so that water can be supplied to the water injector via the second line and the distributor, with the return line opening into the distributor, so that water from the manifold can be returned to the water tank via the return line. In this way, water from the water tank can be supplied to the distributor via the second line. The water can be returned from the distributor to the water tank via the return line. The water can thus advantageously flow through the distributor and thus, for example at high temperatures of the internal combustion engine, the distributor and the water injectors can advantageously be cooled by the water flowing through the distributor. At the same time, the water flowing through the distributor can advantageously be heated by the high temperatures of the internal combustion engine. In this way, the water can be heated not only in the heat exchanger but also in the distributor and thus advantageously higher temperatures can be achieved. In addition, the return line can be used to flush out the air and for cooling at high engine compartment temperatures to avoid vapor.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden in der nachfolgenden Beschreibung näher erläutert. Es zeigen

  • Fig. 1 eine schematische Ansicht einer Brennkraftmaschine mit einer Wassereinspritzvorrichtung,
  • Fig. 2 eine Wassereinspritzvorrichtung gemäß eines ersten Ausführungsbeispiels der vorliegenden Erfindung,
  • Fig. 3 eine Wassereinspritzvorrichtung gemäß eines zweiten Ausführungsbeispiels der vorliegenden Erfindung.
Embodiments of the invention are shown in the drawing and are explained in more detail in the following description. Show it
  • 1 a schematic view of an internal combustion engine with a water injection device,
  • 2 a water injection device according to a first embodiment of the present invention,
  • 3 a water injection device according to a second embodiment of the present invention.

Ausführungsformen der ErfindungEmbodiments of the invention

Nachfolgend wird unter Bezugnahme auf die Figuren eine Wassereinspritzvorrichtung 1 einer Brennkraftmaschine 2 im Detail gemäß verschiedenen Ausführungsbeispielen beschrieben. Insbesondere wird die Brennkraftmaschine 2 nach dem Otto-Prinzip und mit Benzindirekteinspritzung betrieben.A water injection device 1 of an internal combustion engine 2 is described in detail below according to various exemplary embodiments with reference to the figures. In particular, the internal combustion engine 2 is operated according to the Otto principle and with direct fuel injection.

In Fig. 1 sind die Brennkraftmaschine 2 sowie die Wassereinspritzvorrichtung 1 schematisch dargestellt. Die Brennkraftmaschine 2 weist eine Vielzahl von Zylindern auf. Die Brennkraftmaschine 2 umfasst pro Zylinder einen Brennraum 20, in welchem ein Kolben 21 hin und her bewegbar ist. Ferner weist die Brennkraftmaschine 2 pro Zylinder beispielsweise einen Einlasskanal 22 auf, über welchen Luft zum Brennraum 20 zugeführt wird. Abgas wird über einen Abgaskanal 23 abgeführt. Hierzu sind am Einlasskanal 22 ein Einlassventil 25 und am Abgaskanal 23 ein Auslassventil 26 angeordnet. Das Bezugszeichen 24 bezeichnet ferner ein Kraftstoffeinspritzventil.In 1 the internal combustion engine 2 and the water injection device 1 are shown schematically. The internal combustion engine 2 has a plurality of cylinders. The internal combustion engine 2 comprises a combustion chamber 20 per cylinder, in which a piston 21 can be moved back and forth. Furthermore, the internal combustion engine 2 has, for example, one intake port 22 per cylinder, via which air is supplied to the combustion chamber 20 . Exhaust gas is discharged via an exhaust gas duct 23 . For this purpose, an inlet valve 25 is arranged on the inlet duct 22 and an outlet valve 26 is arranged on the exhaust gas duct 23 . Reference numeral 24 also designates a fuel injection valve.

Die Wassereinspritzvorrichtung 1 ist dabei eine Einspritzvorrichtung durch die Wasser in die Brennkraftmaschine 2 eingespritzt wird. Dabei können neben dem Wasser auch andere Medien mit dem Wasser vermengt sein und zusammen mit dem Wasser gespeichert, gefördert und eingespritzt werden. So können dem Wasser beispielsweise Alkohole, wie beispielsweise Ethanol oder Methanol oder andere Zusatzstoffe, die beispielsweise ein Gefrieren des Wassers verhindern, zugemengt sein.The water injection device 1 is an injection device through which water is injected into the internal combustion engine 2 . In addition to the water, other media can also be mixed with the water and stored, pumped and injected together with the water. For example, alcohols, such as ethanol or methanol, or other additives that prevent the water from freezing, for example, can be added to the water.

Die Wassereinspritzvorrichtung 1 umfasst wenigstens einen Wasserinjektor 6. Der Wasserinjektor 6 ist am Einlasskanal 22 angeordnet. Der Wasserinjektor 6 spritzt Wasser in den Einlasskanal 22 der Brennkraftmaschine 2 ein. Der Wasserinjektor 6 wird beispielsweise durch eine Steuereinheit 13 angesteuert. In diesem Ausführungsbeispiel ist ein Wasserinjektor 6 pro Zylinder vorgesehen. Alternativ können zur besseren Aufbereitung oder zur Erhöhung der pro Verbrennungszyklus maximal einspritzbaren Wassermenge zwei Wasserinjektoren pro Zylinder angeordnet sein. Es kann aber beispielsweise auch nur ein Wasserinjektor 6 für alle Zylinder vorgesehen sein.The water injection device 1 comprises at least one water injector 6. The water injector 6 is arranged on the inlet channel 22. The water injector 6 injects water into the intake port 22 of the internal combustion engine 2 . The water injector 6 is controlled by a control unit 13, for example. In this embodiment, one water injector 6 is provided per cylinder. Alternatively, two water injectors can be arranged per cylinder for better treatment or to increase the maximum quantity of water that can be injected per combustion cycle. However, it is also possible, for example, for only one water injector 6 to be provided for all cylinders.

In Fig. 2 ist ein erstes Ausführungsbeispiel einer Wassereinspritzvorrichtung 1 in einem Kraftfahrzeug 100 dargestellt. Die Wassereinspritzvorrichtung 1 umfasst einen Wassertank 5, in dem Wasser gespeichert ist. Weiterhin umfasst die Wassereinspritzvorrichtung 1 Wasserinjektoren 6, die an einem Verteiler 9, der Wasser auf die Wasserinjektoren 6 verteilt, angeordnet sind. Die Wasserinjektoren 6 sind zum Einspritzen von Wasser in die Brennkraftmaschine 2 des Kraftfahrzeugs 100 vorgesehen. Die Wasserinjektoren 6 sind durch eine Leitung 7, 8 mit dem Wassertank 5 verbunden.In 2 a first exemplary embodiment of a water injection device 1 in a motor vehicle 100 is shown. The water injection device 1 comprises a water tank 5 in which water is stored. Furthermore, the water injection device 1 comprises water injectors 6 which are arranged on a distributor 9 which distributes water to the water injectors 6 . The water injectors 6 are provided for injecting water into the internal combustion engine 2 of the motor vehicle 100 . The water injectors 6 are connected to the water tank 5 by a line 7,8.

Ferner umfasst die Wassereinspritzvorrichtung 1, wie in Figur 2 dargestellt, ein beispielsweise als Pumpe ausgebildetes Förderelement 3. Das Förderelement 3 kann Wasser vom Wassertank 5 zu den Wasserinjektoren 6 fördern. Das Förderelement 3 ist in der Leitung 7, 8, die den Wassertank 5 mit den Wasserinjektoren 6 verbindet, angeordnet. Das Förderelement 3 ist beispielsweise als Pumpe ausgebildet. Das Förderelement 3 teilt die Leitung 7, 8 in eine erste Leitung 7 und eine zweite Leitung 8. Dabei ist der Wassertank 5 durch die erste Leitung 7 mit dem Förderelement 3 verbunden. Weiterhin ist das Förderelement durch die zweite Leitung 8 mit den Wasserinjektoren 6 verbunden. Die zweite Leitung 8 mündet in den Verteiler 9, an den die Wasserinjektoren 6 angeschlossen sind. Wasser aus dem Wassertank 5 kann somit über die erste Leitung 7 zu dem Förderelement 3 weiter durch die zweite Leitung 8 und den Verteiler 9 zu den Wasserinjektoren 6 gefördert werden.Furthermore, the water injection device 1, as in figure 2 shown, a conveying element 3 embodied, for example, as a pump. The conveying element 3 can convey water from the water tank 5 to the water injectors 6 . The conveying element 3 is arranged in the line 7, 8, which connects the water tank 5 to the water injectors 6. The conveying element 3 is designed, for example, as a pump. The conveying element 3 divides the line 7 , 8 into a first line 7 and a second line 8 . The water tank 5 is connected to the conveying element 3 through the first line 7 . Furthermore, the conveying element is connected to the water injectors 6 by the second line 8 . The second line 8 opens into the distributor 9 to which the water injectors 6 are connected. Water from the water tank 5 can thus be conveyed further via the first line 7 to the conveying element 3 through the second line 8 and the distributor 9 to the water injectors 6 .

Wie in Fig. 2 dargestellt, umfasst die Wassereinspritzvorrichtung in diesem Ausführungsbeispiel weiterhin eine Rücklaufleitung 10. Die Rücklaufleitung 10 verbindet die Wasserinjektoren 6 mit dem Wassertank 5. Dabei ist die Rücklaufleitung 10 in diesem Ausführungsbeispiel an den Verteiler 9 und an den Wassertank 5 angeschlossen. Somit kann Wasser aus den Wasserinjektoren 6 über den Verteiler 9 weiter durch die Rücklaufleitung 10 zu dem Wassertank 5 zurückgefördert werden. Die Rücklaufleitung 10 ist dazu eingerichtet Wasser vom Wasserinjektor 6 zum Wassertank 5 zurückzuführen.As in 2 shown, the water injection device in this exemplary embodiment also includes a return line 10. The return line 10 connects the water injectors 6 to the water tank 5. The return line 10 is connected to the distributor 9 and to the water tank 5 in this exemplary embodiment. Thus, water from the water injectors 6 can be conveyed back to the water tank 5 via the distributor 9 through the return line 10 . The return line 10 is designed to return water from the water injector 6 to the water tank 5 .

In diesem Ausführungsbeispiel ist die zweite Leitung 8 an einem ersten Ende des in diesem Ausführungsbeispiel rohrförmigen Verteiler 9 angeschlossen und die Rücklaufleitung 10 an einem zweiten Ende des Verteilers 9 angeschlossen. Somit kann der Verteiler 9 von dem ersten Ende des Verteilers 9 zu dem zweiten Ende des Verteilers 9 von Wasser durchflossen werden.In this exemplary embodiment, the second line 8 is connected to a first end of the distributor 9 , which is tubular in this exemplary embodiment, and the return line 10 is connected to a second end of the distributor 9 . Water can thus flow through the distributor 9 from the first end of the distributor 9 to the second end of the distributor 9 .

Weiterhin umfasst die Wassereinspritzvorrichtung 1, wie in Fig. 2 dargestellt, einen Wärmetauscher 50. In diesem Ausführungsbeispiel ist der Wärmetauscher 50 in der zweiten Leitung 8 angeordnet. Der Wärmetauscher 50 kann aber beispielsweise auch in der Rücklaufleitung 10 oder der ersten Leitung 7 angeordnet sein.Furthermore, the water injection device 1, as in 2 shown, a heat exchanger 50. In this exemplary embodiment, the heat exchanger 50 is arranged in the second line 8. However, the heat exchanger 50 can also be arranged, for example, in the return line 10 or the first line 7 .

Unter einem Wärmetauscher wird im Kontext dieser Anmeldung eine Vorrichtung verstanden, die dazu eingerichtet ist, thermische Energie von wenigstens einem ersten Stoffstrom auf einen zweiten Stoffstrom zu übertragen. So wird bei der Wassereinspritzvorrichtung 1 thermische Energie von einem ersten Stoffstrom, beispielsweise einem Stoffstrom der Fahrgastraumheizung, auf einen Wasserstrom des Wassers in der Wassereinspritzvorrichtung 1 übertragen. Durch die Förderung des Wassers aus dem Wassertank durch die Leitungen 7, 8, 10 der Wassereinspritzvorrichtung 1 entsteht ein Wasserstrom. Dieser Wasserstrom wird als zweiter Stoffstrom durch den Wärmetauscher 50 geführt, wobei in den Wärmetauscher 50 Wärme von einem ersten Stoffstrom, beispielsweise einem Stoffstrom der Fahrgastraumheizung, an den Wasserstrom übertragen wird und somit der Wasserstrom in dem Wärmetauscher 50 aufgeheizt wird.In the context of this application, a heat exchanger is understood to mean a device which is set up to transfer thermal energy from at least one first material flow to a second material flow. That's how the Water injection device 1 transfer thermal energy from a first material flow, for example a material flow of the passenger compartment heating, to a water flow of the water in the water injection device 1 . By promoting the water from the water tank through the lines 7, 8, 10 of the water injection device 1, a water flow is created. This water flow is conducted through the heat exchanger 50 as a second flow, with heat being transferred in the heat exchanger 50 from a first flow, for example a flow of the passenger compartment heater, to the water flow and thus the water flow in the heat exchanger 50 being heated.

Wie in Fig. 2 dargestellt, umfasst die Wassereinspritzvorrichtung 1 weiterhin eine Vorheizvorrichtungen 45 zum Vorheizen von gefrorenem Wasser. In diesem Ausführungsbeispiel ist eine Vorheizvorrichtung 45 an dem Förderelement 3 angeordnet und dazu eingerichtet das Förderelement 3 zu beheizen und in dem Förderelement 3 gefrorenes Wasser zumindest teilweise zu schmelzen. Weiterhin ist in diesem Ausführungsbeispiel eine Vorheizvorrichtung 45 an dem Wassertank 5 angeordnet und dazu eingerichtet, den Wassertank 5 zu beheizen und in dem Wassertank 5 gefrorenes Wasser zumindest teilweise zu schmelzen. Die Vorheizvorrichtung 45 kann beispielsweise eine elektrische Heizung sein, die beispielsweise über das Bordnetz des Kraftfahrzeugs gespeist wird.As in 2 shown, the water injection device 1 further comprises a pre-heating device 45 for pre-heating frozen water. In this exemplary embodiment, a preheating device 45 is arranged on the conveying element 3 and is set up to heat the conveying element 3 and to at least partially melt water that is frozen in the conveying element 3 . Furthermore, in this exemplary embodiment, a preheating device 45 is arranged on the water tank 5 and is set up to heat the water tank 5 and to at least partially melt water that has frozen in the water tank 5 . The preheating device 45 can be an electric heater, for example, which is fed, for example, via the on-board network of the motor vehicle.

Wie in Fig. 2 dargestellt, ist in diesem Ausführungsbeispiel der Wassertank 5 in einem Heckbereich 102 des Kraftfahrzeugs 100 angeordnet und der Wärmetauscher 50 in einem Frontbereich 101 des Kraftfahrzeugs 100 angeordnet. Unter dem Frontbereich 101 des Kraftfahrzeugs 100 wird im Kontext der vorliegenden Anmeldung, beispielsweise bei einem zweiaxigen Kraftfahrzeug 100, der Bereich verstanden, der näher an der vorderen Achse des Kraftfahrzeugs 100 liegt als an der hinteren Achse des Kraftfahrzeugs 100. Unter dem Heckbereich 102 des Kraftfahrzeugs 100 wird im Kontext der vorliegenden Anmeldung, beispielsweise bei einem zweiaxigen Kraftfahrzeug 100, der Bereich verstanden, der näher an der hinteren Achse des Kraftfahrzeugs 100 liegt als an der vorderen Achse des Kraftfahrzeugs 100.As in 2 shown, in this exemplary embodiment the water tank 5 is arranged in a rear area 102 of the motor vehicle 100 and the heat exchanger 50 is arranged in a front area 101 of the motor vehicle 100 . In the context of the present application, the front area 101 of the motor vehicle 100, for example in the case of a two-axle motor vehicle 100, is understood to mean the area that is closer to the front axle of the motor vehicle 100 than to the rear axle of the motor vehicle 100. Under the rear area 102 of the motor vehicle 100 is understood in the context of the present application, for example in a two-axle motor vehicle 100, as the area that is closer to the rear axle of motor vehicle 100 than to the front axle of motor vehicle 100.

In Fig. 3 ist ein zweites Ausführungsbeispiel der Wassereinspritzvorrichtung 1 dargestellt. Im Unterschied zu dem ersten Ausführungsbeispiel, ist in dem zweiten Ausführungsbeispiel der Wassereinspritzvorrichtung kein rohrförmiger Verteiler 9 vorgesehen. Das Wasser wird in diesem Ausführungsbeispiel über einen Schlauchverteiler auf die Wasserinjektoren 6 verteilt. Die Rücklaufleitung 10 mündet in diesem Ausführungsbeispiel nicht in den Verteiler 9, sondern in die zweite Leitung 8. Somit kann in diesem Ausführungsbeispiel Wasser von den Wasserinjektoren 6 über die zweite Leitung 8 und die Rücklaufleitung 10 zu dem Wassertank 5 zurückgefördert werden.In 3 a second exemplary embodiment of the water injection device 1 is shown. In contrast to the first embodiment, in the second embodiment of the water injection device there is no tubular distributor 9 intended. In this exemplary embodiment, the water is distributed to the water injectors 6 via a hose distributor. In this exemplary embodiment, the return line 10 does not open into the distributor 9 but into the second line 8 . Thus, in this exemplary embodiment, water can be conveyed back to the water tank 5 from the water injectors 6 via the second line 8 and the return line 10 .

Selbstverständlich sind auch weitere Ausführungsbeispiele und Mischformen der dargestellten Ausführungsbeispiele möglich.Of course, further exemplary embodiments and mixed forms of the exemplary embodiments shown are also possible.

Claims (4)

  1. Motor vehicle comprising a water injection device (1),
    wherein the water injection device, for an internal combustion engine (2), comprises at least one water tank (5) for storing water, at least one water injector (6) for injecting the water into the internal combustion engine (2), and at least one conveying element (3) for conveying water out of the water tank (5) into the water injector (6),
    wherein the water tank (5) is connected to the conveying element (3) by means of at least one first line (7), and the conveying element (3) is connected to the water injector (6) by means of at least one second line (8),
    wherein the water injection device (1) comprises at least one heat exchanger (50) for heating the water, wherein the water injection device (1) comprises at least one preheating device (45) for preheating frozen water,
    wherein the preheating device (45) is arranged at the conveying element (3) and/or at the water tank (5), characterized in that the heat exchanger (50) is arranged in a front region (101) of the motor vehicle (100) and the water tank (5) is arranged in a rear region (102) of the motor vehicle (100).
  2. Motor vehicle according to Claim 1, characterized in that the water injection device (1) furthermore comprises a return line (10) by means of which the water injector (6) is connected to the water tank (6) and which is configured to return water from the water injector (6) to the water tank (5), wherein the heat exchanger (50) is arranged in the first line (7) and/or in the second line (8) and/or in the return line (10).
  3. Motor vehicle according to either one of the preceding claims, characterized in that the heat exchanger (50) is fed from a return line of a passenger compartment heater.
  4. Motor vehicle according to either one of Claims 2 and 3, characterized in that the water injector (6) is connected to a distributor (9),
    wherein the second line (8) opens into the distributor (9) such that water can be fed to the water injector (6) via the second line (8) and the distributor (9),
    wherein the return line (10) opens into the distributor (9) such that water can be returned from the distributor (9) to the water tank (5) via the return line (10).
EP18769609.1A 2017-09-20 2018-09-04 Motor vehicle with water injection device for an internal combustion engine Active EP3685033B1 (en)

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DE102017216627.4A DE102017216627A1 (en) 2017-09-20 2017-09-20 Water injection device for an internal combustion engine, motor vehicle and method for water injection
PCT/EP2018/073683 WO2019057478A1 (en) 2017-09-20 2018-09-04 Water injection device for an internal combustion engine, motor vehicle and method for injecting water

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GB2579643B (en) * 2018-12-10 2021-04-28 Jaguar Land Rover Ltd A heat exchanger for a water injection system, a system, a control system, a method and a vehicle
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FR3100580A1 (en) 2019-09-06 2021-03-12 Psa Automobiles Sa WATER INJECTION PROCESS INTO THE COMBUSTION CHAMBER OF A CONTROLLED IGNITION ENGINE

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WO2019057478A1 (en) 2019-03-28

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